Port diagnostic_analysis to ROS2

[wirthual]

Hi,

as pointed out in the README, diagnostic_analysis is not ported to ROS2 yet.

This PR is intended to change this.

Based of the last branch which had the ROS1 diagnostic_analysis package (Commit: 9d53915)

The provided original test is passing:

root@12ee99e36a1d:/workspaces/ros2/diagnostics# pytest diagnostic_analysis/test/test_bag_csv.py 
====================================================================================== test session starts =======================================================================================
platform linux -- Python 3.12.3, pytest-7.4.4, pluggy-1.4.0
rootdir: /workspaces/ros2/diagnostics/diagnostic_analysis
plugins: ament-xmllint-0.17.5, launch-testing-3.4.11, ament-lint-0.17.5, ament-pep257-0.17.5, ament-flake8-0.17.5, ament-copyright-0.17.5, launch-testing-ros-0.26.12, colcon-core-0.21.0
collected 4 items                                                                                                                                                                                

diagnostic_analysis/test/test_bag_csv.py ....                                                                                                                                              [100%]

======================================================================================= 4 passed in 0.17s ========================================================================================